---
id: common-problems
title: Common Problems
description: The Common Problems plugin analyzes spans part of a trace to identify errors. The Tracetest Analyzer analyzes OpenTelemetry traces.
keywords:
  - tracetest
  - trace-based testing
  - observability
  - distributed tracing
  - testing
image: https://res.cloudinary.com/djwdcmwdz/image/upload/v1698686403/docs/Blog_Thumbnail_14_rsvkmo.jpg
---

The `Common Problems` plugin is responsible of analyzing the spans that are part of a trace in order to identify frequent mistakes in the distributed system.

![Common Problems](../../img/common-problems.png)

## Rules

- [prefer-dns](/analyzer/rules/prefer-dns)
